Using the following portion of the activity series for oxidation half reactions, determine which combination of reactants will result in a reaction. Na(s) → Na+(aq) + e- Cr(s) → Cr3+(aq) + 3 e-

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy